Flush-tank supply-valve.



J; S. GALDWELL.

PLUSH TANK SUPPLY VALVE.

APPLIOATION FILED JULY.12,1907.

91 3,808. Patented Mar. 2, 1909.

HIIIIIHHIIIIII UNITE@ STATES PATENT OFFICE.

JAMES S. CALDWELL, OF KANSAS CITY, MISSOURI, ASSIGNOR OF ONE-HALF TO FRANK M. JACKSON, OF KANSAS CITY, MISSOURI.

FLUSH-TANK SQPPLY-VALVE,

Specification of Letters Patent.

Patented March 2, 1909.

To all whom it may conce/rn:

Be it known that I, JAMES S. CALDWELL, a citizen of the United States, residing at liansas City, in the county of Jackson and Sta te of Missouri, have invented certain new and useful Improlvements in Flush-Tank Supply- Valves, of which the following.; is a specilication.

This invention relates to flush-tank supply valves, and my object is to produce a device of this character in which th(` valve closes with the pressure, which is equipped with all-metal all-ground seats to avoid tho nocessity of frequent repair, which embodies an inverted seat, and a knife-edge cup to engage said seat for the purpose of preventing sand and lother foreign substances in the water from interfering with the proper engagement of said cup with said seat.

A still further object is to produce a valve which operates ei'licientlv and reliably and which is of simple, strong, durable and inexpensive construction and to which access may be easily and quickly had for any purose.

vWith these objects in view the invention consists in certain novel and peculiar 'faatures of construction and organization as hereinafter described and claimed g and in order that it may be full)T understood reiference is to be had to the accompanying dra ings, in which:-

Figure 1, is a plan view of a part of a flush box equipped with a valve embodying my invention. Fig. 2, is a central vertical section taken on the line II-II of the saine. Fig. 3, is an enlarged horizontal section taken on the line III-III of Fig. d. 1Fig. ei, is a central vertical section taken on the same line as Fig. 2, but on the scale of Fig. 3.

In the said drawings l indicates a flush boX of the usual or any preferred type and l a Water supply pipe for the same. The valve casing is in two parts, the upper part, 4, having outwardly projecting lugs 5 through which screws 6 extend to secure it to the tank. The said upper part is provided with a vertical passage 7 in its upper end and with a spout 8 connecting with the interior of said part below said upper end.

9 is a valve-seat-casting onto which the upper and lower parts of the casing are screwed or otherwise secured. This casting which is in the forin of a threaded cylinder is provided with a central cylindrical portion l0, the passage of said portion being ground to insure a porfectbT smooth wall and being of uniform diameter throughout, said wall at a suitable point boing provided with an opening il.. Above said opening the wall is of increased thickness the thicker portion being beveled downward and outward at its lower end to provide an inclined downwardly-disposed annular seat 12, the lower portion of the wall being ground externally in order to `lit with a water-tight relation into a cup 13 formed integral with or secured to the lower ond of a valve plug 14, the securing means shown being a screw-bolt l5. The valve plug le is ground into perfect cylindrical form to iit with a water-tight relation in the passage of the cylindrical portion l0. The plug is cast with or otherwise secured upon the lower' end of a vertical valve-stem 16, and secured 'upon lthe upper end of said stem with a screw-thread relation, as shown or otherwise, is a cylindrical head 17 for said stein, the head being provided with upwardly projecting ears IS.

19 indicates lugs on the upper part of the casing and pivoted to and between said lugs is a bell-crank lever 20 having a float 21 at its outer end and connected by a toggle-joint with a pair of lugs 22 also cast with the upper part of the casing, the toggle-joint comprising links 23 and 24. and being connected pivotally at its middle with the lugs 18 by a link '25.

Then the tank is charged "with water as shown in Fig. 2-the water which is in the casing being omitted from the drawing to avoid obscur-ing the same in any part-the lioat is elevated and, through the connections descrihed, holds tho valve elevated with the beveled or knife edge u per end of the cup engaging the downwardly disposed seat l2 and the plug lll closing opening 11. IVhen the water is permitted to ilow from the tank, the float falls and in such action tends to straighten the toggle and force the valve downward. The continued downward movement of the float results in unseating the plug and cup at about the same moment, and as this occurs the water under pressure, rushes vfrom the lower part S of the casing over the cup and through opening 11 above the plug, and then passes up into the chamber of the upper part 4 of the casing and escapes thence into the tank, it being understood that the water moves at sufficient speed and in suflicient volume to recharge the tanlr to the required depth, When the float reseats the plug by causing it to recover opening l1 and the cup by the reengagement of its beveled or knife-edge upper end With the downwardly disposed seat 12. It Will thus be seen that this valve provides a double seal against the entrance of Water into the tank so that there shall be no possibility of a volume or" Water entering the tank suiicient to overloW therefrom. It Will also be apparent that access may be had to the valve or valve casting by screwing the loWer art 3 of the casing down onto pipe 2 until it is disengaged from said valve casting, When it may slide doWn further upon said pipe and clear the casting, the threaded portion of the inlet pipe 2 being of greater external diameter than the smooth portion of the same, as indicated in Fig. 2. The valve casting may then be screWed downward until it is disengaged from the upper part of the casing, it being obvious that before the casting can be thus manipulated, the cuplS must be detached from the plug 14. The latter may be removed by WithdraWing the pivot connecting the members of the toggle and then pulling the valve With its head and stem up through the upper part of the casing. lt Will thus be seen that the entire valve can be practically dismantled Without disturbing the upper part of the casing or the iloat, and that said parts can be reassembled by reversing the operations described.

From the above description it will be apparent that l have produced a valve for flush tanks Which embodies the features of advantage enumerated as desirable in the statement of the obj ect of the invention and While I have illustrated and described its preferred embodiment, it is to be understood that i reserve the right to maire such changes as properly fall Within the spiritand scope of the appended claim.

Having thus described the invention What l claim as neW and desire to secure by Letters Patent, is

A supply valve for lush tanks, comprising a cylindrical casting having a cylindrical portion provided With an opening and a downwardly disposed annular seat above and externally oi' said opening, a casing detachably secured to the casting and comprising a depending loWer part and an up- Wardly projecting upper part, the latter having a passage in its upper end in line With the passage ci the casting and also having a spout above the latter, a valve comprising a cylindrical plug i'itting With a Water-tight relation in the passage of the casting, a cup rigid With and surrounding said plug and externally embracing the cylindrical portion of the casting beloW said annular seat, a head iitting slidingly in the passage of the upper portion or" the casing, and a stem of less diameter than and connecting the plug and said head, a bell-crank lever pivoted to the upper part of the casing, a iioat secured to the outer end of said lever, a toggle-joint between the opposite end of said lever and the casing, and a link pivotally connecting the head of the valve and the pivotal point of connection oi' the members of said togglejoint.

ln testimony whereof l aiiix my signature, in the presence of tWo Witnesses.

JAMES S. CALDELL.

`Witnesses H. C. RoDGERs, G. Y. THORPE. 

